Koninklijke Philips Corporation N.v.

Geert Guy Georges Morren

Ronaldus Maria Aarts

Jens Muehlsteff

Robert Pinter

Haris Duric

Jens Muhlsteff

Xavier Louis Marie Antoine Aubert

Anmin Jin

Bin Jin

A method for monitoring the blood pressure of a patient, comprising the following steps: determining a pulse arrival time signal from the patientbased on the pulse wave velocity method; determining an accelerometer signal from the patient; and triggering an additional measure or deriving a blood pressure value, taking into account the pulse arrival time signal and a DC component of the accelerometer signal. In this way, a possibility for monitoring the blood pressure of a patient is provided with which false alarms and/or unnecessary additional cuff-based blood pressure measurements can be avoided.

Monitoring the blood pressure of a patient

The invention relates to a method and apparatus for determining a respiration of a subject () in which, with a single multi-axial accelerometer () positioned on a body of the subject (), accelerometer signals are generated () indicative of the acceleration of the subject () along different spatial axes, a vector magnitude signal of the acceleration of the subject () along the different spatial axes is calculated () from the accelerometer signals, a non-respiratory motion contribution to the acceleration along the different spatial axes is identified () from the vector magnitude signal, which non-respiratory motion contribution is not caused by the respiration, and a respiration signal indicative of the respiration of the subject is determined () by filtering the non-respiratory motion contribution from at least one of the accelerometer signals. In this way a method is provided which determines the respiration of a subject () with a single accelerometer () in an efficient and, for a patient, comfortable way.

Method and apparatus for determining a respiration signal

The invention relates to a motion determination apparatus for determining motion of a moving object, wherein the motion determination apparatus () comprises a multi-axial accelerometer () for being positioned at the moving object (), wherein the multi-axial accelerometer () is adapted to generate accelerometer signals indicative of the acceleration along different spatial axes. The motion determination apparatus further comprises a motion signal generation unit () for generating a motion signal indicative of the motion of the object () by combining the accelerometer signals of different spatial axes. The combination of the accelerometer signals of different spatial axes yields a motion signal having a large signal-to-noise ratio, even if an axis is located close to a rotational axis of the movement.

Motion determination apparatus

Respiration of a patient is detected by emitting an electromagnetic signal towards the patient; receiving a reflected electromagnetic signal reflected from the patient; converting the reflected electromagnetic signal, yielding a first signal; phase-shifting the reflected electromagnetic signal and converting the phase-shifted reflected electromagnetic signal, yielding a second signal; determining a first vector being defined by the time derivatives of the first signal and the second signal, for a common first point in time; determining a second vector being defined by the time derivatives of the first signal and the second signal, for a common second point in time; and calculating the scalar product of the normalized first vector and the normalized second vector as an indicator value for a change from expiration to inspiration of the patient or vice versa. A change from expiration to inspiration of the patient or vice versa is preferably indicated if the indicator value is below a threshold value, preferably below a value of 0. In this way, respiration is monitored contactlessly and remotely based on the Doppler radar principle which is reliable and easy to handle.

Contactless respiration monitoring of a patient

The invention provides a phototherapy device that includes a controlled environment defined by a plurality of transparent panels and at least one light emitting diode portion that projects light into the controlled environment.

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Vissenaken, Belgium

Geert Guy Georges Morren